The enzyme glucose-6-phosphate dehydrogenase deficiency (G6PD) is inherited as a recessive gene on the X chromosome in humans. A phenotypically normal woman (whose father had G6PD) is married to a normal man
(a) What fraction of their sons would be expected to have G6PD?
(b) If the husband had G6PD, would it make a difference in your answer in part (a)?
(a) 1/2
(b) no
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In the figure above, which number represents the point in the cell cycle during which the chromosomes are replicated?
A) I B) II C) III D) IV E) V
An organism can take advantage of energy available from both light and from organic molecules and exhibit both phototrophy and chemoorganotrophy.
Answer the following statement true (T) or false (F)
Which of the following is not a primate characteristic?
A) rotating shoulders B) stereoscopic vision C) large litter size D) flattened nails instead of claws
Yellow fever and Dengue fever are
A. caused by viruses that disrupt capillaries and blood clotting. B. transmitted by a mosquito vector. C. caused by arboviruses. D. zoonoses. E. All of the choices are correct.